From 0b1ec79069dc3d535050011fa55c4c71b5ecbd0c Mon Sep 17 00:00:00 2001 From: zardoz Date: Tue, 8 Jul 2014 12:26:59 +0000 Subject: [PATCH] Added a comment --- ...mment_5_8df6cc8b72e0e78c7380f7d471124498._comment | 12 ++++++++++++ 1 file changed, 12 insertions(+) create mode 100644 doc/forum/performance_and_multiple_replication_problems/comment_5_8df6cc8b72e0e78c7380f7d471124498._comment diff --git a/doc/forum/performance_and_multiple_replication_problems/comment_5_8df6cc8b72e0e78c7380f7d471124498._comment b/doc/forum/performance_and_multiple_replication_problems/comment_5_8df6cc8b72e0e78c7380f7d471124498._comment new file mode 100644 index 0000000000..f881942f90 --- /dev/null +++ b/doc/forum/performance_and_multiple_replication_problems/comment_5_8df6cc8b72e0e78c7380f7d471124498._comment @@ -0,0 +1,12 @@ +[[!comment format=mdwn + username="zardoz" + ip="134.147.14.84" + subject="comment 5" + date="2014-07-08T12:26:58Z" + content=""" +Something to keep in mind for some point in the future: btrfs supports an efficient method by which one can inquire exactly which files have changed since a specified point in time, where the point in time is measured by a unit called «generation». + +A program can request the current «generation» index, and later ask btrfs which files have changed after that index, without needing to walk the file-system. This is currently implemented in the user-space program «btrfs filesystem find-new». While it’s called «find-new», this not only find newly created files, but also changed files. + +Currently, it seems one needs to be super-user to use «find-new», because it lists changed files for complete subvolumes, but since generations are stored per-file, in the future there will likely be a user-space method for regular users. +"""]]